1. why do we need to use shifted unit step function in defining second shifting theorem?(adsbygoogle = window.adsbygoogle || []).push({});

2. why don't we instead calculate laplace transform of a time shifted function just by replacing t by t-a?

3. everywhere in the books as well as internet i see second shifting theorem defined for f(t-a).u(t-a),

why not just f(t-a)?

4. what is the value of laplace transforms for negative limits?

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# Second shifting theorem of laplace transform

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